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Processing technology for high purity calcium aluminate cement

A calcium aluminate cement and processing technology, which is applied in the processing technology field of special refractory material binders, can solve the problems of many raw materials and fuels, heavy equipment weight, and great difficulty, and achieve stable quality, high purity, and good refractory performance Effect

Inactive Publication Date: 2013-01-09
王世林
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most manufacturers of high-purity calcium aluminate cement at home and abroad are produced by electric melting method, which is high in production cost and difficult. Although some of them also use sintering method, the calcination equipment adopts shuttle kiln or rotary kiln. to make
The shuttle kiln is a batch kiln with low production capacity and serious energy waste; while the rotary kiln has a large infrastructure investment, heavy equipment weight, and a large floor area. In addition, the exhaust gas of the rotary kiln has a large dust content, so it needs to be equipped with High temperature resistant dust collection equipment, more raw materials and fuel per unit product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] With γ-alumina as the main crystal phase of industrial alumina and high-purity limestone as raw materials, the Al of industrial alumina 2 o 3 content>98.5%, the main component of high-purity limestone is CaO, and then processed according to the following steps:

[0015] 1) According to the percentage by weight, make a mixture of 50% industrial alumina and 30% high-purity limestone, put 0.01% dispersant into the mixture, stir evenly, and then send it to the fine grinding equipment for ultra-fine Grinding until the fineness d50 is 1 micron;

[0016] 2) Add the fine abrasive, water and binder evenly into the continuous ball forming machine to make a billet; the weight ratio of fine abrasive, water and dispersant is 70:10:0.5;

[0017] 3) Drying the billet, put the dried billet into the shaft kiln for calcination, and heat it to 1350°C for 10 hours;

[0018] 4) Product selection, crushing, grinding, iron removal, and packaging.

Embodiment 2

[0020] With γ-alumina as the main crystal phase of industrial alumina and high-purity limestone as raw materials, the Al of industrial alumina 2 o 3 content>98.5%, the main component of high-purity limestone is CaO, and then processed according to the following steps:

[0021] 1) According to the percentage by weight, 70% of industrial alumina and 50% of high-purity limestone are made into a mixture, and 0.05% by weight of dispersant is added to the mixture, stirred evenly, and then sent to the fine grinding equipment for ultrafine grinding Grinding until the fineness d50 is 10 microns;

[0022] 2) Add the fine abrasive, water and binder evenly into the continuous ball forming machine to make the billet; the weight ratio of fine abrasive, water and dispersant is 90: 30: 3.5;

[0023] 3) Drying the billet, put the dried billet into the shaft kiln for calcination, and heat it to 1500°C for 24 hours;

[0024] 4) Product selection, crushing, grinding, iron removal, and packagin...

Embodiment 3

[0026] With γ-alumina as the main crystal phase of industrial alumina and high-purity limestone as raw materials, the Al of industrial alumina 2 o 3 content>98.5%, the main component of high-purity limestone is CaO, and then processed according to the following steps:

[0027] 1) According to the weight percentage, make a mixture of 60% industrial alumina and 40% high-purity limestone, put a dispersant into the mixture at a weight ratio of 0.02%, stir evenly, and then send it to the fine grinding equipment for ultra-fine grinding Grinding until the fineness d50 is 6 microns;

[0028] 2) Add the fine abrasive, water and binder evenly into the continuous ball forming machine to make the billet; the weight ratio of fine abrasive, water and dispersant is 80:20:2.5;

[0029] 3) Drying the billet, put the dried billet into the shaft kiln for calcination, and heat it to 1400°C for 18 hours;

[0030] 4) Product selection, crushing, grinding, iron removal, and packaging.

[0031] A...

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PUM

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Abstract

The invention relates to a processing technology for a special refractory material binder. According to the invention, imported gamma-alumina and high purity limestone are taken as the raw materials, an organic dispersant is added, so that the product has the advantages of high purity, stable quality and good fireproof performance. According to the invention, the raw material employs a continuous ball forming mill, thereby the problem of difficult realization of automation moulding of raw material by a semi-dry process and a wet method can be solved.

Description

Technical field: [0001] The invention relates to a processing technology of a special refractory material binder, in particular to a processing technology of high-purity calcium aluminate cement. Background technique [0002] High-purity calcium aluminate cement has good early strength performance, high residual strength at medium temperature, and high refractoriness (>l 650°C). For example, W (A1 2 o 3 ,) increased to 80%, the refractoriness can reach l 790 ℃, and has strong wear resistance, anti-flaking, anti-reducing medium erosion ability, suitable for use as cement or amorphous refractory materials used under high temperature, high pressure and reducing conditions . [0003] At present, most manufacturers of high-purity calcium aluminate cement at home and abroad are produced by electric melting method, which is high in production cost and difficult. Although some of them also use sintering method, the calcination equipment adopts shuttle kiln or rotary kiln....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/32
Inventor 王世林
Owner 王世林